Fix sgx_epid linking issue

Author: iKapitonau

Makefile

@@ -148,10 +148,6 @@ GO_TAGS := $(build_tags)
 # -ldflags
 LD_FLAGS := $(ldflags)
 
-ifeq ($(SGX_MODE), HW)
-  CGO_LDFLAGS += $(shell pkg-config --libs libsgx_epid)
-endif
-
 all: build_all
 
 go.sum: go.mod

go-cosmwasm/Makefile

@@ -63,6 +63,11 @@ build: build-rust build-go
 
 .PHONY: build-rust
 build-rust: build-enclave
+	if [[ $(SGX_MODE) == HW ]]; then \
+		sed -i 's/sgx_epid_sim/sgx_epid/' ./api/link_std.go; \
+	else \
+		sed -i 's/sgx_epid/sgx_epid_sim/' ./api/link_std.go; \
+	fi;
 	cargo build -Z unstable-options --profile $(BUILD_PROFILE) --features "$(FEATURES_U)"
 	cp target/$(BUILD_PROFILE)/libgo_cosmwasm.$(DLL_EXT) api
 	@ #this pulls out ELF symbols, 80% size reduction!

go-cosmwasm/api/link_std.go

@@ -3,5 +3,5 @@
 
 package api
 
-// #cgo LDFLAGS: -Wl,-rpath,${SRCDIR} -L${SRCDIR} -lgo_cosmwasm -lsgx_dcap_ql -lsgx_dcap_quoteverify
+// #cgo LDFLAGS: -Wl,-rpath,${SRCDIR} -L${SRCDIR} -lgo_cosmwasm -lsgx_dcap_ql -lsgx_dcap_quoteverify -lsgx_epid
 import "C"